787991740 has 24 divisors (see below), whose sum is σ = 1655885952. Its totient is φ = 314986560.

The previous prime is 787991719. The next prime is 787991749. The reversal of 787991740 is 47199787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787991749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19605 + ... + 44275.

It is an arithmetic number, because the mean of its divisors is an integer number (68995248).

Almost surely, 2^787991740 is an apocalyptic number.

It is an amenable number.

787991740 is an abundant number, since it is smaller than the sum of its proper divisors (867894212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

787991740 is a wasteful number, since it uses less digits than its factorization.

787991740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26277 (or 26275 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 52.

The square root of 787991740 is about 28071.1905696926. The cubic root of 787991740 is about 923.6495472638.

The spelling of 787991740 in words is "seven hundred eighty-seven million, nine hundred ninety-one thousand, seven hundred forty".